Printer apparatus

Abstract

A printer apparatus having a print head which has a first pressure chamber into which a discharge medium is introduced, a second pressure chamber into which a feed medium is introduced, and at least one set of nozzles comprised of a first nozzle communicated with the first pressure chamber and a second nozzle communicated with the second pressure chamber arranged adjacent to each other and which mixes and discharges the discharge medium and the feed medium from the nozzles, wherein a liquid repellent treatment is applied to at least one of the portion between the mutually adjoining first nozzle and second nozzle and a portion between the sets of nozzles adjoining each other on a nozzle opening face of the print head; wherein a projecting portion is formed on at least one of the portion between the mutually adjoining first nozzle and second nozzle and the portion between the sets of nozzles adjoining each other on the nozzle opening face of the print head; or wherein a recessed portion is formed between the mutually adjoining sets of nozzles of the nozzle opening face of the print head.

What is claimed is: 
     
       1. A printer apparatus comprising: a print head having a printing surface;   a first pressure chamber into which a discharge medium is introduced;   a second pressure chamber into which a feed medium is introduced; and   a plurality of sets of nozzles, each set of nozzles including a first nozzle and a second nozzle, the first nozzle being in communication with the first pressure chamber and the second nozzle being in communication with the second pressure chamber; wherein,     each of said first nozzle and said second nozzle has an opening on said printing surface,   said discharge medium and feed medium are mixed on said printing surface, and   a liquid repellant treatment is provided on said printing surface, said liquid repellant treatment being effective to separate said discharge medium and feed medium during a non-discharge state.   
     
     
       2. A printer apparatus as set forth in claim 1, wherein the liquid repellent treatment is applied to an entire surface of said surface of the print head. 
     
     
       3. The printer apparatus as set forth in claim 1, wherein an area between the first nozzle and second nozzle is a first portion and an area between at least two sets of nozzles is a second portion, and a projecting portion is formed on at least one of the first and second portions. 
     
     
       4. The printer apparatus as set forth in claim 1, wherein at least two sets of the plurality of sets of nozzles are adjacent one another and a recessed portion is formed between the adjacent sets of nozzles. 
     
     
       5. The printer apparatus as set forth in claim 1, wherein said first nozzle extends perpendicular from said printing surface, and said second nozzle extends from said printing surface away from said first nozzle, said first nozzle and said second nozzle forming an angle ⊖. 
     
     
       6. A method of manufacturing a printer apparatus comprising the steps of, providing a print head having a printing surface;   providing a plurality of pairs of first and second nozzles behind the printing surface and connecting each of said first and second nozzles to respective first and second chambers, wherein each of said first and second nozzles has an opening on the printing surface for mixing an ink and a diluent on the printing surface;   applying a liquid repellant treatment at least on the printing surface between said first and second nozzles; and   forming a projecting portion at least between adjacent members of said plurality of pairs of first and second nozzles.